Free AI Plagiarism & Duplicate Text Checker Online

Scan, detect, and rewrite content instantly with our AI-powered plagiarism checker and article generator. Get accurate duplicate checks for free with Squadexa AI. Try today!

Our advanced plagiarism detection tool scans your content against billions of web pages and documents to identify duplicate or copied text. Get detailed reports showing similarity percentages and sources of matched content.

Perfect for students, writers, content creators, and businesses who need to ensure originality. Our tool helps you verify content authenticity, avoid accidental plagiarism, and maintain high-quality standards.

AI Plagiarism Checker

AI Plagiarism & Duplicate Content Checker

Detect plagiarism in your content using advanced AI technology

Plagiarism Detection

Web Search

Similarity Analysis

Detailed Reports

Text Input

Free & Unlimited - No Daily Limits

Use the Plagiarism Checker as much as you want, completely free!

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Paste any text above or upload a .txt/.docx file to check for plagiarism. Our advanced system searches the web and provides detailed similarity reports.

Analysis Results

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Enter text and click "Check Plagiarism" to see results

How It Works

Smart Web Search

We search the web (Perplexity Sonar Pro) for exact and close matches to your text.

Embedding Similarity

OpenAI or local embeddings compute cosine similarity to confirm true matches.

Clear Evidence

Per‑source % match, links, and highlighted sentences for easy auditing.

Tips for Best Results

For Accurate Detection

Provide at least 50–100 words for better accuracy
Include complete sentences; avoid fragments
Use product‑specific phrases, not just headings
If you know the suspected source, include a key sentence

Understanding Scores

0–39%: Low risk; mostly unique
40–69%: Medium risk; rephrase or cite sections
70–89%: High risk; rewrite and attribute sources
90–100%: Very high risk; complete rewrite needed